I use the ISC offset bushings for some time in upper front in a street car/trackday car and it feels fine. Maybe if they where on the lower arm it would feel harder. I can recomend them.

 

Craig, Emilio mentioned in another thread 949 will be releasing offset bushings in the near future. Potentially up to -4 on stock control arms.

Edit: although the ISC bushings aren't terribly expensive, and they're available now.

 

I had -4.5* in the front of my car without any aftermarket arms or bushings.

I think extending the LCA is the best option available outside of simple bushings, but you might have to source inner tie rods or make your own spherical outer tie rods.

 

Wow. -2.5 is the max for my NB2.

 

I have the offset UCA bushings from these guys and 15x9 6ULs.

Miata Suspension

The wheel hits the A-arm at full lock one way, but not the other. This is because my steering rack isn't centered properly (I took it apart once and must have put it back a spline or two offset) and I've been too lazy to fix it. Realistically, it's not an issue because the 6ULs have Hoosier A6s on them, I basically only use full lock while parallel parking, and there's not much call for that at an autox.

And yes, 5mm spacers should fix it.

-3.5 front camber works nicely with A6s on my car.

One other minor issue with them is that the FM silicone compressor-to-intercooler hose wants to occupy the same space as the washers on the now-offset UCA pivot point. Left alone, the washer will rub a hole in the silicone, but this is fixed with a couple of zip ties.

--Ian